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Old Apr 18, 2017 | 01:21 AM
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Gear question

What is a good gear ratio for running 37" tires? I've lost quite an it of fuel mileage of course. Wondering if I'd get much back going lower. I think I have 3:55
 
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Old Apr 18, 2017 | 01:56 AM
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3.73, 4.10, 4.30, or even 4.56. At around $2k, I'm not sure the juice is worth the squeeze, though, especially with the diesel having plenty of power. I recommend you just drive it and enjoy the truck. Constantly worrying about mileage is a great way to stay perpetually cranky.


Life's too short, not to mention that while mileage costs do add up over time, they are a miniscule percentage of what you just paid for a Lariat and 37" tires/wheels. Just drive and be happy.
 
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Old Apr 18, 2017 | 08:53 AM
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Question

Originally Posted by Oxfordbp
What is a good gear ratio for running 37" tires? I've lost quite an it of fuel mileage of course. Wondering if I'd get much back going lower. I think I have 3:55
Does your fuel economy calculation include an odometer correction for the non-stock tire size? For example, without the correction, 10 mpg with 37's is the same as ~12 mpg with 31's.

Regards,
Jim / crewzer
 
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Old Apr 18, 2017 | 09:09 AM
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Would not going with such large tires mean you get great highway miles per gallon, and terrible city miles per gallon?
 
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Old Apr 18, 2017 | 09:46 AM
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Originally Posted by milkweed.gardener
Would not going with such large tires mean you get great highway miles per gallon, and terrible city miles per gallon?
Not necessarily. The heavier tires/wheels alone will drag down MPG. Add the height it gets even worse. A (very) general rule of thumb is every 1" of added height reduces MPG by 1.
 
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Old Apr 18, 2017 | 10:59 AM
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Originally Posted by kry226
3.73, 4.10, 4.30, or even 4.56. At around $2k, I'm not sure the juice is worth the squeeze, though, especially with the diesel having plenty of power. I recommend you just drive it and enjoy the truck. Constantly worrying about mileage is a great way to stay perpetually cranky.


Life's too short, not to mention that while mileage costs do add up over time, they are a miniscule percentage of what you just paid for a Lariat and 37" tires/wheels. Just drive and be happy.



Words of wisdom...
 
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